AppSync 4.0

Even though there still isn’t an official Jailbreak for 4.0 firmware for the public, the hackulo team has already made it possible to have cracked apps on 4.0 versions.

This app (appsync) makes it possible to have paid apps for free. Without this app Installous is pointless and downloading paid apps for free online is meaningless too. So if you have a 4.0 version and want appsync, check this article out  for more details. 

P.S: The article on how to do it is pretty old so you should: 1) After adding the source download AppSync 4.0 . 2) The official website for cracked apps is apptrackr.org.

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